Rail-supporting structure.



C. M. GIDANSKI.

RAIL SUPPORTING STRUCTURE.

APPLIGATION FILED MAY 12,1913.

1 1 1 O, 1 24:, Patented Sept. 8, 1914 inflar,

THE MORRIS PETERS Cn.. PHOTO-LITHO., WASH/NGTON. D. C.

CHARLES M. GIDANSIII, OF NEVI YGRK, N. Y.

RAIL-SUPPORTING STRUCTURE.

To all 'whom t may concern Be it known that I, CHAnLnsM. GiDANsKr, a citizen of the United States, residing at the city of New York, in the borough of Brooklyn and State of New York, have invented certain new and useful improvements in Rail-Supporting tructures, of which the following is a full, clear, and exact descripn tion.

This invention relates to improvements in rail'supporting structures.

One of the objects of my invention is to provide means for substantially preventing deterioration of the rails due to corrugation.

According to the present con'sti-uctior.. of urban and subway lines the ties are einbedded for their entire length in a foundation or road bed of concrete or some other substantially unyielding substance upon which the rails aie directly laid. As a car vor train passes over the rail thewheel load is distributed over a relatively 4small area of the top surface of the rail. This stress is transmitted through the rail to the foundation, which will not yield as the stress at fthe base of the rail is distributed over a comparatively large area. The deformation caused by the load will therefore, occur al- 4most entirely within the rail which should portion of the top surface of the rail which sustains the wheel load for a short interval of time will be strained beyond its elastic limit. resulting in the formation of a shallow indentation. the displaced or extruded portion of the surface forming a'ridge in front of the indentation. Upon the frequent passing-of wheelsunder heavy loads over the rails the indentationwill become deeper and thel ridge more pronounced resulting finally in corrugation of the rails to such an extent that. the track and rolling stock will be afl: fected upon the passing of a heavily loadedl car over the rails.

My invention therefore resides in the prod `vision of means whereby the deformationcaused by the wheel load will occur in thel supporting` structure rather than in the rail itself and I obtain this result by providing a yielding supporting structure, interposed Specification of Letters Patent.

Application filed May 12, 1913.

Patented Sept. 8, 1914.

Serial No. 767,113.

between the rails and rigid foundation which `structure is deflected under the wheel load but within its elastic limit. Y f

`inthe accompanying drawing l have illustrated an embodiment of my invention, but it is not my intention to be limited to the specific form'shown, but only by the scope of the claims appended hereto.

In the drawings, Figure v'l is a plan view showing my improved form of supporting structure portions of the pavement being removed. Figs. 2, 3 and 4 are sections on the lines 2-2, 3 3, @L -t, respectively.

ln the drawings l designates the foundation or road bed made of concrete or some other substantially non-yielding material which is customarily used lin the constructionl of road beds in urban and subway lines.

Space'd apart at definite intervals are the ties 2 provided with offset ends 3@ These ties with the exception of their offset encs are embedded in the concrete foundation kso that theyr will be rigidly held against di engage over the upper surfaces of the* iianges or bases of the rails and are secured to the offset ends thereby holding the rails against displacement. Recesses 7 are. pro- Avided in thev concrete foundation surrounding the cantaliver or offset ends 3 which are therefore free to be deflected vertically by the wheel load. Shallow grooves or trenches 8 connected with the recesses 7 are formed in the concrete foundation directly beneath the base or flange of the track rails, i"

so that thebase of the rail does not i'est directly upon the concrete foundation any point. Theload is therefore carried entirely by the offset ends of the ties. The ties as shown consist of steel l-beams which are of.; o

suiiicient strength to withstand thewcantaliver and shearing stresses due to the'wheel load without strainingbeyond vtheir elastic limit, yet yielding sufficiently to permit des.

ioo

lection'of the offset or cantaliver ends under" tion to steel ties as it is obvious that any;

ties therefor rigidly supported by said road of contact With said structure and a rail bed, said road bed having recesses surroundbearing directly on said oifset end. ing the ends of the ties and an elastic Waterl In witness whereof, I subscribe my signaproof filler in said recesses. ture, in the presence of two Witnesses.

11. In combination, a substantially un- CHARLES M. GIDANSKI. yielding supporting structure and a resilient Witnesses: member mounted on said supporting struc- WALDo M. CHAPIN, ture, said member having an offset end out JULE ZELENKO.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

